. >> reporter: even after having lived here for years, obama was vulnerable to a charge bubby rush would surely make. he didn't really know these streets. and he's not really an african-american. >> bobby rush called him an educated fool again trying to sort of cast obama as this overeducated, half white guy from hawaii with this multicultural background. he was not one of us >> you can have more degrees than a thermometer but if you ain't got some power, if you ain't got some seniority, if you ain't got what it takes... >> reporter: it's always been a sub text of the opposition to him from other black politicians. how dedicated is he to black black struggle? >> despite all our differences, we can live together as one people. >> there's a long article about the race in the chicago reader, the local alternative paper in chicago where one of obama's opponents, he says obama is viewed as the white man in black face in our community. >> it got bad. it was real bad. a number of black nationalists in the african-american community, you know, made all sorts of allegations about barack being a t